ELECTRICAL:- High power factor(≥ 95%), instant start, high frequency energy, from the electronic ballast (generator); High-frequency power to the discharge vessel (lamp) to initiate and maintain a gas discharge for a rated 100,000 hours of life. - Low start-up temperature, closed fixture for ambient temperatures range is from -25°C to 50°C; Higher ambient temperatures may reduce lamp life. - Input voltage: 120-277V.- Input frequency: 50/60Hz.